When the US Department of Agriculture last week said that results of a screening test had raised the possibility that a second cow in the United States was infected with bovine spongiform encephalopathy, investors took notice.
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In Science this week: convergent evolution in bird hemoglobin, and more.
The Wall Street Journal speaks with patients affected by questionable test results from Theranos.
Researchers link variants in TACR3 to hot flashes during menopause, Live Science reports.
Kuwait says it will alter its law requiring citizens and visitors to provide DNA samples, New Scientist reports.